Iran's colorful terraces are a rare geological masterpiece.

This abandoned fishing settlement may well be the greenest village in the world.

The hottest place on the planet.

A canvas of crops grow from vibrant red soil in this terraced farmland.

This small group of sand dunes manages to pack in a strange rainbow of colors.

Bohol's mysterious brown hills.

Constant erosion has created a surreal landscape of bleached and preserved fallen trees.

The massive white mound and accompanying water terraces are a striking geological oddity.

Roman ruins top white travertine terraces formed by ancient hot springs.

Tubing through a cave lit with glowworms is a magical underground experience.

A desert that rolls right up to the ocean, where it's so dry animals live off the fog.

An exquisite tunnel of cascading flowers.

The sound of swaying stalks in this stunning grove has been named a governmentally recognized sound.

A solitary tree has grown up all alone on Lake Wānaka, backdropped by the beautiful Southern Alps.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

The centuries-old trees lining both sides of this dirt road may become Madagascar's first natural monument.

Woven tree art gives this towering Australian woodland a touch of mystical whimsy.

Step inside the first house designed by Catalan architect Antoni Gaudí, considered to be one of the first Art Nouveau buildings.

Hundreds of boat-shaped headstones fill this graveyard as part of a centuries-old custom with mysterious origins.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

A once-thriving hotel in the Swiss Alps couldn't compete with climate change.

The sounds of the world's largest fully functioning pipe organ dazzle shoppers at a Philadelphia Macy's.

It's not hard to see why the historic Peabody Conservatory of Music's library has been described as a "cathedral of books."

Science fiction's grandfather has a fittingly marvelous tomb.